Ключевые слова: 2022, airport, app, blackboard, certificate, certification, chalk writing, christmas, concept, coronavirus, covid, covid19, digital, disease, document, epidemic, health, healthcare, healthy, identification, immune, immunity, immunization, infection, international, mask, medical, medicine, new year, pandemic, passenger, prevention, protection, qr code, quarantine, security, tourism, tourist, travel, traveler, vaccination, vaccine, virus, wood,